[PATCH] Addditional classmark check against A5/4 support

msuraev at sysmocom.de msuraev at sysmocom.de
Thu Apr 21 12:58:30 UTC 2016


From: Max <msuraev at sysmocom.de>

Add classmark check function according to GSM 04.08 Chapter 10.5.1.7
Fix interface to use unsigned for unsigned value.
---
 include/osmocom/gsm/gsm_utils.h | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/include/osmocom/gsm/gsm_utils.h b/include/osmocom/gsm/gsm_utils.h
index 99aae65..0fbfcba 100644
--- a/include/osmocom/gsm/gsm_utils.h
+++ b/include/osmocom/gsm/gsm_utils.h
@@ -119,7 +119,7 @@ int rxlev2dbm(uint8_t rxlev);
 uint8_t dbm2rxlev(int dbm);
 
 /* According to GSM 04.08 Chapter 10.5.1.6 */
-static inline int ms_cm2_a5n_support(uint8_t *cm2, int n) {
+static inline int ms_cm2_a5n_support(uint8_t *cm2, unsigned n) {
 	switch (n) {
 		case 0: return 1;
 		case 1: return (cm2[0] & (1<<3)) ? 0 : 1;
@@ -130,6 +130,18 @@ static inline int ms_cm2_a5n_support(uint8_t *cm2, int n) {
 	}
 }
 
+/* According to GSM 04.08 Chapter 10.5.1.7 */
+static inline int ms_cm3_a5n_support(uint8_t *cm3, unsigned n) {
+	switch (n) {
+		case 4: return (cm3[0] & (1<<0)) ? 1 : 0;
+		case 5: return (cm3[0] & (1<<1)) ? 1 : 0;
+		case 6: return (cm3[0] & (1<<2)) ? 1 : 0;
+	        case 7: return (cm3[0] & (1<<3)) ? 1 : 0;
+		default:
+			return 0;
+	}
+}
+
 /* According to GSM 04.08 Chapter 10.5.2.29 */
 static inline int rach_max_trans_val2raw(int val) { return (val >> 1) & 3; }
 static inline int rach_max_trans_raw2val(int raw) {
-- 
2.8.1



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